Boolean and combining objects for 3D printing
I used the Bolt Factory tutorial and the Bool tool tutorial ad-dons

Pick the object you want to use as a &quot;drill bit&quot; (bolt with threads)
Pick the item you want to drill/place the hole in (box or object) and choose Difference
Note: You could also use Ctrl+Shift+-
(this keyboard combination does bool difference)



Make tolerances for bolt to screw into object

Note: you may want to 3D print the bolt horizontal for strength
3D print the bolt horizontal for strength